<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form action="https://www.baidu.com"method="post">
        <div>
            <label for="input" >签名</label>
            <input type="text"
             name="signature"
             placeholder="请输入签名"
              id=" input"
              required>
        </div>
        <div>
            <input type="submit" value="提交">
        </div>
    </form>
    
</body>
</html>